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Results for “Mandibular Prosthesis”

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At least 1,099 records · Page 61Linked to original sources
PubMedDate not supplied

Mandible reconstruction with microvascular surgery.

Microvascular surgery has become the preferred method for mandible reconstruction. Whenever possible, immediate reconstruction at the time of segmental mandible resection will provide the best aesthetic and functional result. Four donor sites (fibula, iliac crest, radial forearm, and scapula) have become the primary sources of vascularized bone and soft tissue for the reconstruction. The fibula has multiple advantages, including bone length and thickness, donor site location permitting flap harvest simultaneously with tumor resection, and minimal donor site morbidity. The fibula donor site should be the first choice for most defects, particularly those with anterior or large bony defects requiring multiple osteotomies. Use of an alternative donor site is best reserved for cases with large soft tissue and minimal bone requirements. Dental rehabilitation through the use of prostheses and osseointegrated dental implants is an important part of the reconstructive process to optimize aesthetics and function. An algorithm for mandible reconstruction with microvascular osseous flaps is presented. Semin. Surg. Oncol. 19:226-234, 2000.

Bone Transplantation↗
PubMed1997

Comparison of different materials for interposition arthroplasty in treatment of temporomandibular joint ankylosis surgery: long-term follow-up in 25 cases.

A variety of interposition materials have been used to prevent recurrence after arthroplasty in treatment of temporomandibular joint ankylosis. The purpose of this retrospective study of our experience was to compare the different materials (skin, temporal muscle, homologous cartilage) used for interposition arthroplasty over a period of 22 years. A total of 25 patients (32 joints) with at least 3 years of follow-up were included. Good results were achieved in 92% of cases using total full thickness skin graft and 83% of cases using temporal muscle flap. Homologous cartilage gave poor results.

Adolescent↗
PubMed1996

One-step reconstruction of the severely resorbed mandible with onlay bone grafts and endosteal implants. A 5-year follow-up.

The severely resorbed mandibles (Cawood and Howell class VI) of 31 female patients were reconstructed with a corticocancellous bone graft with ITI implants in a one-step procedure. After 12-16 weeks, a combined mucosally and implant-supported overdenture was made by an experienced prosthodontist. After 3, 6, 12, 24, and 60 months, orthopantomograms were made, and the height of the bone was measured mesial and distal of each implant. The overall bone resorption rate was almost 50%, but it varied around each implant. Eight of 78 implants were lost. Bone resorption occurred in an unpredictable way. The technique used can no longer be recommended.

Adult↗
PubMed1999

Stereoscopic lithography: customized titanium implants in orofacial reconstruction. A new surgical technique without flap cover.

Head and neck surgery may involve complex methods of composite reconstruction that do not replicate the volume and contour of the normal anatomy. 'Functional' reconstruction implies replication of the normal volume and contour of both hard and soft tissues to produce normal form and function of the face, mouth and jaws. Techniques such as stereoscopic lithography and computer-assisted design, and-manufacture (CAD-CAM) have been successfully used with computer-numerized control (CNC) milling to manufacture customized titanium implants for single-stage reconstruction of the maxilla, hemimandible and dentition without the use of composite flap cover after the removal of tumours. Reduction in theatre time and personnel, less need for intensive care, and earlier discharge from hospital, indicate possible savings of Pound Sterling 17,000-Pound Sterling 19,000 per patient. There are implications for surgery in general, and further research and development is advocated.

Adult↗
PubMed1990

Determination of occlusal vertical dimension by means of controlled pressure against tissues supporting a complete denture.

In order to establish the vertical dimension (VD) of a complete denture prosthesis, a new method of determining a comfortable mandibular position was tested using a recently designed hydraulic jack (hydraulic vertical displacement meter) in five edentulous patients. The device was designed so as to vary occlusal height by means of an extraoral jig connected to intra-oral hydraulic jacks, and to distribute the bite pressure applied against the denture-supporting tissue in approximately the same pattern as that produced by a denture with a VD preferred by the patient. The most comfortable mandibular position determined by this method coincided remarkably with the preferred VD of each patient in our study, indicating that the new device may be used to establish VD for complete denture construction.

Aged↗
PubMed1994

[Therapy of the severely atrophied mandible].

The problems encountered in implant treatment of extensively resorbed mandibles concern poor residual height of the bone and the use of short implants in the least favorable prognosis, excessive corticalization of the bone making drilling difficult, poor vascularity of the implant site, and mechanical constraints sustained by implants bearing high prosthesis. This paper addresses these problems and suggests solutions, using author's own experience and the findings of other clinicians, published in professional literature. To solve poor vascularity of the implant site, the paper suggests preliminary stimulation of the bone prior to implant placement. New drilling steps are described, calling for disposable drills not only in the initial phase but in the subsequent drilling as well. Using a new drill for each surgical procedure provides the optimal sharpness, thereby decreasing the temperature generated at the site, which must not exceed the limit of 47 degrees C. To improve short implant performance, the use of wider diameter implants with tapping insertion is suggested for initial stabilization, along with avoidance of premature utilization of the implant. An unfavorable ratio between the prosthesis and the implant may cause fractures either in the implant or the prosthesis. To avoid these fractures, utilization of wider diameter implants, decrease of the cantilever size, and gradual utilization of the implants are suggested.

Alveolar Bone Loss↗
PubMed1997

Sleep apnoea.

Explore the source record for details and available documents.

Humans↗
PubMed2004

Functional rehabilitation of the atrophic mandible and maxilla with fibula flaps and implant-supported prosthesis.

Historically, nonvascularized bone grafts have been the standard treatment for severe mandibular and maxillary atrophy, followed by immediate or delayed implant placement. Extreme atrophy is an unfavorable biological and mechanical location for nonvascularized autologous bone transplants. The authors present the results of a multidisciplinary treatment protocol for rehabilitation of extreme mandibular and maxillary atrophy by use of the vascularized fibular flap. This protocol includes bone augmentation, implant surgery, soft-tissue management, and prosthetic restoration. Since 1993, 18 patients with a mean age of 47.5 years presented with extreme mandibular and/or maxillary atrophy and underwent alveolar crest augmentation with vascularized fibular flaps. Bone healing was achieved in 17 of the 18 patients. Seventy-three osteointegrated implants were inserted in 12 of 17 fibular flaps. Altogether, 62 implants were loaded and 11 dental prostheses were made. Average follow-up of the loaded implants was 41 months. The success rate of loaded implants was 100 percent. The authors strongly recommend the use of the fibular bone flap when dealing with extreme atrophy of the mandible and maxilla and suggest the protocol outlined in this review.

Adult↗